Simple, men spend most of their time trying to have sex with women. Everything action and thought a man takes is trying to have sex with a woman.
But the gay man, with easy access to sex with other men, suddenly has all this brain power to focus on other things. And after sex comes violence.
So tribes with Gay men are able to conquer more territory because the gay male has more time to plan the attacks and build the weapons, while the straight male is looking for some food so he can have sex with a woman.
(chuckle)
And here I always thought it was because their caves looked simply fabulous!
I can’t tell if you are serious or facetious. Either way, it’s another Darwinian just so story.